Investments (Continuous unrealized loss position) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Available-for-sale And Held-To-Maturity Securities, Continuous Unrealized Loss Position [Abstract] [Abstract]    
Less than 12 months, fair value $ 55,391 $ 41,564
Less than 12 months, unrealized losses (531) (441)
12 months or longer, fair value 4,536 3,993
12 months or longer, unrealized losses (436) (483)
Total, fair value 59,927 45,557
Total, unrealized losses (967) (924)
State and municipal securities
   
Available-for-sale And Held-To-Maturity Securities, Continuous Unrealized Loss Position [Abstract] [Abstract]    
Less than 12 months, fair value 0 1,659
Less than 12 months, unrealized losses 0 (8)
12 months or longer, fair value 0 0
12 months or longer, unrealized losses 0 0
Total, fair value 0 1,659
Total, unrealized losses 0 (8)
Mortgage-backed securities & CMO's
   
Available-for-sale And Held-To-Maturity Securities, Continuous Unrealized Loss Position [Abstract] [Abstract]    
Less than 12 months, fair value   39,905
Less than 12 months, unrealized losses   (433)
12 months or longer, fair value   3,993
12 months or longer, unrealized losses   (483)
Total, fair value   43,898
Total, unrealized losses   (916)
Residential Mortgage Backed Securities
   
Available-for-sale And Held-To-Maturity Securities, Continuous Unrealized Loss Position [Abstract] [Abstract]    
Less than 12 months, fair value 55,391  
Less than 12 months, unrealized losses (531)  
12 months or longer, fair value 4,536  
12 months or longer, unrealized losses (436)  
Total, fair value 59,927  
Total, unrealized losses (967)  
SBA Pools
   
Available-for-sale And Held-To-Maturity Securities, Continuous Unrealized Loss Position [Abstract] [Abstract]    
Less than 12 months, fair value 0  
Less than 12 months, unrealized losses 0  
12 months or longer, fair value 0  
12 months or longer, unrealized losses 0  
Total, fair value 0  
Total, unrealized losses $ 0